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  • MSEA-D-20-06787_final

    Rights statement: This is the author’s version of a work that was accepted for publication in Materials Science and Engineering: A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering: A, 814, 2021 DOI: 10.1016/j.msea.2021.141238

    Accepted author manuscript, 2.66 MB, PDF document

    Embargo ends: 7/04/22

    Available under license: CC BY-NC-ND

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Microstructures and mechanical properties of Nb nanoparticles modified Ni60 hard-facing alloy fabricated by laser metal deposition

Research output: Contribution to journalJournal articlepeer-review

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  • L. Liu
  • W. Wang
  • X. Zhang
  • X. Li
  • Y. Tian
  • X. Zhao
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Article number141238
<mark>Journal publication date</mark>13/05/2021
<mark>Journal</mark>Materials Science and Engineering: A
Volume814
Number of pages13
Publication StatusPublished
Early online date7/04/21
<mark>Original language</mark>English

Abstract

Crack-free samples were made from Nb nanoparticles modified Ni60 hard-facing alloy using laser metal deposition. Addition of Nb nanoparticles was carried out to modify the columnar dendrites and eutectic microstructures by providing large number of nucleation sites. The purpose of this study was to evaluate the effect of nanoparticles addition on cracking susceptibility of Ni–Cr–B–Si alloy. The results show that with addition of Nb nanoparticles, the cracking susceptibility reduced significantly with acceptable hardness loss. Large hard phases were refined and the columnar dendrites were converted to equiaxed grains, leading to a separated eutectic microstructure which restrain the initiation and growth of cracks. The study demonstrated a new method to tackle the cracking problem of laser manufactured Ni–Cr–B–Si alloys, accelerating the adoption of Ni–Cr–B–Si alloys on additive manufacturing applications.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Materials Science and Engineering: A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering: A, 814, 2021 DOI: 10.1016/j.msea.2021.141238